This compact device handles the high power systems such as the electric fans and the fuel pump control. It simply plugs into the throttle body via MSD's CAN-Bus network with a single connection. It supplies power to the fuel pump so you don't need to run an external relay. Also, it has two activation wires so you can set temperature settings for dual electric cooling fans.The Handheld Monitor and the throttle body both plug into the Power Module through single connectors to tie the entire system together.